<template>
  <form action="/" >
    <van-search
        v-model="searchText"
        show-action
        placeholder="请输入要搜索的标签"
        @search="onSearch"
        @cancel="onCancel"
    />
  </form>
  <van-divider content-position="left">已选标签</van-divider>
  <div v-if="activeIds.length === 0">请选择标签</div>
  <van-row gutter="20">
    <van-col v-for="tag in activeIds">
      <van-tag  :show="true" closeable size="small" type="primary" @close="doClose(tag)">
        {{tag}}
      </van-tag>
    </van-col>
  </van-row>

  <van-divider content-position="left">选择标签</van-divider>
  <van-tree-select
      v-model:active-id="activeIds"
      v-model:main-active-index="activeIndex"
      :items="tagList"

  />
  <div style="padding: 20px">
    <van-button block type="primary" @click="doSearchResult" >搜索</van-button>
  </div>

</template>


<script setup lang="ts">
import {ref} from 'vue';
import {Toast} from 'vant';
import {useRouter} from "vue-router";

const router = useRouter();

const searchText = ref('');


//已选中的标签
const activeIds = ref([]);
const activeIndex = ref(0);

const originTagList = [
  {
    text: '性别',
    children: [
      { text: '男', id: '男' },
      { text: '女', id: '女' },
    ],
  },
  {
    text: '年级',
    children: [
      { text: '大一', id: '大一' },
      { text: '大二', id: '大二' },
      { text: '大3', id: '大3' },
      { text: '大4', id: '大4' },
      { text: '大5', id: '大5' },
      { text: '大sfgsgs', id: '大sdfafa' },
    ],
  },
]

//标签列表
let tagList = ref(originTagList);
/**
 * 搜索过滤
 */
const onSearch = (val) => {
  tagList.value = originTagList.map(parentTag => {

    const tempChildren = [...parentTag.children];
    const tempParentTag = {...parentTag};

    tempParentTag.children = tempChildren.filter(item => item.text.includes(searchText.value));
    return tempParentTag;
  });
}
const onCancel = () => {
  searchText.value = '';
  tagList.value = originTagList;
}
//移除标签
const doClose = (tag) => {
  activeIds.value = activeIds.value.filter(item => {
    return item !== tag
  })
}

/**
 * 执行搜索
 */
const doSearchResult = () => {
  router.push({
    path: '/user/list',
    query: {
      tags: activeIds.value
    }
  })
}
</script>

<style scoped>
.homeWrap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
</style>